[PATCH 2/2] ARM: dts: snow: Add board dts file for Snow board (ARM Chromebook)

[dianders@chromium.org (Doug Anderson)]

This dts file is based on the Snow dts file in the Chromium OS kernel
tree with the following changes:
* Some details have been updated to match the exynos5250-smdk5250.dts
  file from linux-next (as of
  c11068538994430547722dc9fb515a0ceefd5cb9).
* This file doesn't include references to hardware whose upstream
  support isn't quite there yet.  That includes most i2c devices.
  Note that most i2c busses have been included with no devices.

The Snow dts file is mostly just an include of the "cros5250" dts file
which describes a class of similar boards.  Support for other boards
has not yet been send upstream.

With this file and a change to use UART3 for serial output I can:
* Boot to a command line using either SD or EMMC as a root filesystem
* See the power button and lid switch using evtest.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
 arch/arm/boot/dts/Makefile             |    3 +-
 arch/arm/boot/dts/cros5250-common.dtsi |  184 ++++++++++++++++++++++++++++++++
 arch/arm/boot/dts/exynos5250-snow.dts  |   43 ++++++++
 3 files changed, 229 insertions(+), 1 deletions(-)
 create mode 100644 arch/arm/boot/dts/cros5250-common.dtsi
 create mode 100644 arch/arm/boot/dts/exynos5250-snow.dts

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 701388b..7d43a13 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -36,7 +36,8 @@ dtb-$(CONFIG_ARCH_EXYNOS) += exynos4210-origen.dtb \
 	exynos4210-smdkv310.dtb \
 	exynos4210-trats.dtb \
 	exynos4412-smdk4412.dtb \
-	exynos5250-smdk5250.dtb
+	exynos5250-smdk5250.dtb \
+	exynos5250-snow.dtb
 dtb-$(CONFIG_ARCH_HIGHBANK) += highbank.dtb \
 	ecx-2000.dtb
 dtb-$(CONFIG_ARCH_INTEGRATOR) += integratorap.dtb \
diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
new file mode 100644
index 0000000..fddd174
--- /dev/null
+++ b/arch/arm/boot/dts/cros5250-common.dtsi
@@ -0,0 +1,184 @@
+/*
+ * Common device tree include for all Exynos 5250 boards based off of Daisy.
+ *
+ * Copyright (c) 2012 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+/ {
+	aliases {
+	};
+
+	memory {
+		reg = <0x40000000 0x80000000>;
+	};
+
+	chosen {
+	};
+
+	i2c at 12C60000 {
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <378000>;
+		gpios = <&gpb3 0 2 3 0>,
+			<&gpb3 1 2 3 0>;
+	};
+
+	i2c at 12C70000 {
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <378000>;
+		gpios = <&gpb3 2 2 3 0>,
+			<&gpb3 3 2 3 0>;
+	};
+
+	i2c at 12C80000 {
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
+
+		/*
+		 * Disabled pullups since external part has its own pullups and
+		 * double-pulling gets us out of spec in some cases.
+		 */
+		gpios = <&gpa0 6 3 0 0>,
+			<&gpa0 7 3 0 0>;
+
+		hdmiddc at 50 {
+			compatible = "samsung,exynos5-hdmiddc";
+			reg = <0x50>;
+		};
+	};
+
+	i2c at 12C90000 {
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
+		gpios = <&gpa1 2 3 3 0>,
+			<&gpa1 3 3 3 0>;
+	};
+
+	i2c at 12CA0000 {
+		status = "disabled";
+	};
+
+	i2c at 12CB0000 {
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
+		gpios = <&gpa2 2 3 3 0>,
+			<&gpa2 3 3 3 0>;
+	};
+
+	i2c at 12CC0000 {
+		status = "disabled";
+	};
+
+	i2c at 12CD0000 {
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
+		gpios = <&gpb2 2 3 3 0>,
+			<&gpb2 3 3 3 0>;
+	};
+
+	i2c at 12CE0000 {
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <378000>;
+
+		hdmiphy at 38 {
+			compatible = "samsung,exynos5-hdmiphy";
+			reg = <0x38>;
+		};
+	};
+
+	dwmmc0 at 12200000 {
+		num-slots = <1>;
+		supports-highspeed;
+		broken-cd;
+		fifo-depth = <0x80>;
+		card-detect-delay = <200>;
+		samsung,dw-mshc-ciu-div = <3>;
+		samsung,dw-mshc-sdr-timing = <2 3 3>;
+		samsung,dw-mshc-ddr-timing = <1 2 3>;
+
+		slot at 0 {
+			reg = <0>;
+			bus-width = <8>;
+			gpios = <&gpc0 0 2 0 3>, <&gpc0 1 2 0 3>,
+				<&gpc1 0 2 3 3>, <&gpc1 1 2 3 3>,
+				<&gpc1 2 2 3 3>, <&gpc1 3 2 3 3>,
+				<&gpc0 3 2 3 3>, <&gpc0 4 2 3 3>,
+				<&gpc0 5 2 3 3>, <&gpc0 6 2 3 3>;
+		};
+	};
+
+	dwmmc1 at 12210000 {
+		status = "disabled";
+	};
+
+	dwmmc2 at 12220000 {
+		num-slots = <1>;
+		supports-highspeed;
+		fifo-depth = <0x80>;
+		card-detect-delay = <200>;
+		samsung,dw-mshc-ciu-div = <3>;
+		samsung,dw-mshc-sdr-timing = <2 3 3>;
+		samsung,dw-mshc-ddr-timing = <1 2 3>;
+
+		slot at 0 {
+			reg = <0>;
+			bus-width = <4>;
+			samsung,cd-pinmux-gpio = <&gpc3 2 2 3 3>;
+			wp-gpios = <&gpc2 1 0 0 3>;
+			gpios = <&gpc3 0 2 0 3>, <&gpc3 1 2 0 3>,
+				<&gpc3 3 2 3 3>, <&gpc3 4 2 3 3>,
+				<&gpc3 5 2 3 3>, <&gpc3 6 2 3 3>;
+		};
+	};
+
+	dwmmc3 at 12230000 {
+		num-slots = <1>;
+		supports-highspeed;
+		broken-cd;
+		fifo-depth = <0x80>;
+		card-detect-delay = <200>;
+		samsung,dw-mshc-ciu-div = <3>;
+		samsung,dw-mshc-sdr-timing = <2 3 3>;
+		samsung,dw-mshc-ddr-timing = <1 2 3>;
+
+		slot at 0 {
+			reg = <0>;
+			bus-width = <4>;
+			/* See board-specific dts files for GPIOs */
+		};
+	};
+
+	spi_0: spi at 12d20000 {
+		status = "disabled";
+	};
+
+	spi_1: spi at 12d30000 {
+		gpios = <&gpa2 4 2 3 0>,
+			<&gpa2 6 2 3 0>,
+			<&gpa2 7 2 3 0>;
+		samsung,spi-src-clk = <0>;
+		num-cs = <1>;
+	};
+
+	spi_2: spi at 12d40000 {
+		status = "disabled";
+	};
+
+	hdmi {
+		hpd-gpio = <&gpx3 7 0xf 1 3>;
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		power {
+			label = "Power";
+			gpios = <&gpx1 3 0 0x10000 0>;
+			linux,code = <116>; /* KEY_POWER */
+			gpio-key,wakeup;
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
new file mode 100644
index 0000000..17dd951
--- /dev/null
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -0,0 +1,43 @@
+/*
+ * Google Snow board device tree source
+ *
+ * Copyright (c) 2012 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+/dts-v1/;
+/include/ "exynos5250.dtsi"
+/include/ "cros5250-common.dtsi"
+
+/ {
+	model = "Google Snow";
+	compatible = "google,snow", "samsung,exynos5250";
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		lid-switch {
+			label = "Lid";
+			gpios = <&gpx3 5 0 0x10000 0>;
+			linux,input-type = <5>; /* EV_SW */
+			linux,code = <0>; /* SW_LID */
+			debounce-interval = <1>;
+			gpio-key,wakeup;
+		};
+	};
+
+	/*
+	 * On Snow we've got SIP WiFi and so can keep drive strengths low to
+	 * reduce EMI.
+	 */
+	dwmmc3 at 12230000 {
+		slot at 0 {
+			gpios = <&gpc4 0 2 0 0>, <&gpc4 1 2 3 0>,
+				<&gpc4 3 2 3 0>, <&gpc4 4 2 3 0>,
+				<&gpc4 5 2 3 0>, <&gpc4 6 2 3 0>;
+		};
+	};
+};
-- 
1.7.7.3